Mechanical Engineering - Engineering Mechanics

11. 

A smooth cylinder lying on its convex surface remains in __________ equilibrium.

A. stable
B. unstable
C. neutral

Answer: Option B

Explanation:

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12. 

Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

A. Yes
B. No

Answer: Option A

Explanation:

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13. 

Moment of inertia of a circular section about an axis perpendicular to the section is

A. πd3/16
B. πd3/32
C. πd4/32
D. πd4/64

Answer: Option C

Explanation:

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14. 

The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

A.
B.
C.
D.

Answer: Option B

Explanation:

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15. 

The unit of angular acceleration is

A. N-m
B. m/s
C. m/s2
D. rad/s2

Answer: Option D

Explanation:

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